I always use ADAC (German AAA equivalent) to rent cars, especially for the US, and prepay them. They then send me a PDF that tells the car rental clerk in German, English and Spanish that they are to provide exactly what the voucher says and no further options, like prepaid fuel or supplemental insurances (ADAC rentals include 1M EUR in liability and comprehensive insurance).

The only suspense left is whether I get the compact I signed up for, or some monstrous SUV because they’re all out of more sensible options. A few hints about how bad I am at backing up anything larger than a Camry has gotten results.